If you’re feeling generous, you have more options than to open your wallet or build a giftable DIY project. You have plenty of homegrown body parts you can donate to people in need. From blood and hair to your entire body, here are things you can contribute to a good cause now, or when you don’t need them anymore.

The holidays are here, which means it’s time for you to make your annual charitable donations in a desperate attempt to cleanse the stains your dark soul has accumulated this year. Below is a thoroughly vetted list of the most effective life-saving charities in the world.

Charity Miles boasts that you “earn money for charity” just by going for a walk with your phone in your pocket. Other apps like Donate a Photo and Tinbox funnel money to charity and give you the feeling you’ve donated without actually opening your wallet. So where does the money actually come from?

If tragedy hits someone you know, and a friend sets up a crowdfunding page to help them out with medical bills or other expenses, it’s natural to want to donate a few bucks. But some of these pages are scams—even if the tragedy is real, and happened to someone you know.

When a disaster occurs, you may want to donate blood to help out. While it may be more helpful to wait rather than donate immediately, you’ll need to know where your local blood bank is either way. This tool can help.

Fitness trackers can help you reach your goals, if you have a plan to stay motivated...and if you can afford one in the first place. RecycleHealth, a program based at Tufts University, is collecting donated trackers to help with the second half of that equation.

If you’ve been playing video games for any amount of time, odds are pretty high you have at least one console in your entertainment center doing nothing, and that sucks. Don’t let your old friend sit there and collect a gross film of dust and grime, give it a new life—or find someone who will. Here’s how.

When your kids get new toys, donating some of their old ones can help children in need, and keep your own household clutter down. Stuffed Animals for Emergencies (SAFE) accepts gently used toys (not just new ones) and sends them directly to kids who can use them rather than selling them.

The end of the year is a perfect time to donate stuff you don’t want, but finding the time to drop it off makes it tough. Give Back Box is a new service that provides free shipping labels you can use to mail donations to the nearest Goodwill, using whatever boxes you get from your holiday shopping.

Android/iOS: We’ve all had times where we wanted to challenge a buddy or coworker to a friendly wager, or maybe just a dare. “Loser buys pizza,” or “owes me a drink,” or even “gives five dollars to my favorite charity.” Parlay is an app that makes that easy, and makes cashing in easy too.

It’s hard figuring out where to donate to charity, when there are so many issues we care about. If you want to donate to the refugee crisis that’s at the top of the news now, your money will go further and you can be sure it’s delivered appropriately thanks to Google.

Android/iOS: Fitness trackers are a great way to gamify your fitness goals and compete with others. If you're motivated by helping others, free app Charity Miles helps you earn money while you run or bike.

Whether you're sharing the holiday spirit or looking for a year-end deduction, lots of folks give to charity around this time of year. Before you donate, check with your employer to see if they'll match the donation.

The holidays are a great time of the year to give thanks for the things you have, and to give to those less fortunate. Sure, most charities and non-profits could use a hand any time of year, but the holidays are special. Let's build a list of good causes to donate to now that the holidays are in full swing.